"hot cathode" meaning in All languages combined

{
  "forms": [
    {
      "form": "hot cathodes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hot cathode (plural hot cathodes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "cold cathode"
        }
      ],
      "glosses": [
        "The heated cathode of a thermionic valve"
      ],
      "hypernyms": [
        {
          "word": "cathode"
        }
      ],
      "id": "en-hot_cathode-en-noun-aoZWSuap",
      "links": [
        [
          "thermionic valve",
          "thermionic valve"
        ]
      ],
      "wikipedia": [
        "en:hot cathode"
      ]
    }
  ],
  "word": "hot cathode"
}

{
  "coordinate_terms": [
    {
      "word": "cold cathode"
    }
  ],
  "forms": [
    {
      "form": "hot cathodes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hot cathode (plural hot cathodes)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "cathode"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns"
      ],
      "glosses": [
        "The heated cathode of a thermionic valve"
      ],
      "links": [
        [
          "thermionic valve",
          "thermionic valve"
        ]
      ],
      "wikipedia": [
        "en:hot cathode"
      ]
    }
  ],
  "word": "hot cathode"
}